PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM STANDARD_DATA_PRODUCT_ID = HEA DATA_SET_ID = "MEX-M-MRS-1/2/3-PRM-0622-V1.0" PRODUCT_ID = "M00SUE0L1A_HEA_053292221_00.TXT" PRODUCT_CREATION_TIME = 2007-09-12T14:24:22.000 PRODUCER_ID = "SUE" INSTRUMENT_HOST_ID = "MEX" OBJECT = TEXT PUBLICATION_DATE = 2005-11-27 NOTE = "DSN MEX Data Collection" END_OBJECT = TEXT END Miscellaneous ============= This is the first report since HEA5320A.TXT. These are the first radio occultation data collected since 2005/262, because the occultations fell within or too close to spacecraft eclipses. Open Loop Data ============== Data Collection --------------- We have completed quick-look processing on the following MEX RSR open loop radio occultation data at Stanford: DOY DSS RSR BAND RSR CH KSPS BT REC RECS RSR MAX START STOP ID RS LEN FILE NAME SNR --- --- -------- -------- ---- --- -- ---- -- ----- ----- ------------ ----- 323 14 11:44:00 12:02:00 X/XR 4 1 2 16 8260 1081 5323114A.RSR 66.3 323 14 11:44:00 12:02:00 X/SR 3 1 2 16 8260 1081 5323114B.RSR 55.7 326 63 00:13:00 00:31:00 X/XR 4 1 2 16 8260 1081 5326001A.RSR 66.7 326 63 00:13:00 00:31:00 X/SR 3 1 2 16 8260 1081 5326001B.RSR 55.3 327 63 03:08:00 03:26:00 X/XR 4 1 2 16 8260 1081 5327030A.RSR 41.1 327 63 03:08:00 03:26:00 X/SR 3 1 2 16 8260 1081 5327030B.RSR 54.0 329 63 22:21:00 22:39:00 X/XR 4 1 2 16 8260 1081 5329222A.RSR 61.9 329 63 22:21:00 22:39:00 X/SR 3 1 2 16 8260 1081 5329222B.RSR -1.2 330 14 05:04:00 05:22:00 X/XR 4 1 2 16 8260 1081 5330050A.RSR 62.8 330 14 05:04:00 05:22:00 X/SR 3 1 2 16 8260 1081 5330050B.RSR 55.7 331 14 07:58:00 08:16:00 X/XR 4 1 2 16 8260 1081 5331075A.RSR 62.3 331 14 07:58:00 08:16:00 X/SR 3 1 2 16 8260 1081 5331075B.RSR 56.1 All of these data appear to have been collected with X-band telemetry on; otherwise the MAX SNR would have been approximately 75 dB/Hz. The low X-band SNR on day 327 suggests that LCP was being fed to the RSR, rather than RCP. This is an occasional problem at DSS 63, which the other stations don't seem to suffer. There is no S-band signal on day 329. There was some confusion regarding spacecraft configurations for the observations on days 329-331. The DSN keyword file showed the spacecraft in the one-way configuration, and in some cases there was to be no S-band downlink. It appears that corrective action by ESOC was successful for days 330 and 331. On day 329, X-band remains two-way, but there is no S-band signal. An occultation at DSS 14 on 2005/325 (10:29-11:01) was lost because the spacecraft was one-way and the signal(s) fell outside the bandwidth which was recorded. These data were not transferred to Stanford. There are transient surface echoes accompanying each occultation for which SNR exceeded 50 dB/Hz. There are spurs all across the X-band spectra in each case where SNR was higher than 60 dB/Hz; these come primarily from weak 50/60 Hz modulation (ground loops) in the tracking station, but telemetry modulation may also be contributing. A second occultation on day 331 was scheduled for collection at DSS 65; but a conflict with Cassini operations forced Mars Express to use the VSR equipment (normally used for VLBI support, but otherwise very similar to the RSR). Converting the data from VSR to RSR format will take a few days.